Rosa.] ROSACE/E. 103 



than the other, which rivals the larger forms of *. in size. This var. 

 and . seem less inclined to spread by suckers than the other vars. of 

 the species. The British (arid Irish) forms of S. dumetorum, is often 

 of humble arid feeble growth, but vigorous plants also occur, six to eight 

 feet high. It has much general resemblance to R. inodora. It bears 

 somewhat small, but rather uncinate prickles, numerous for this spe- 

 cies ; leaflets, for the most part, broadly oval, the terminal one some- 

 times almost cordate, their serratures coarse, their hue dull green but 

 shining, the hairs on the upper surface being appressed and very incon- 

 spicuous ; calyx-pinna varying in closeness ; styles nearly or quite 

 included ; stigmas in a round head ; fruit elliptical, varying in length. 

 Plants agreeing with this var. in pubescence, but in other respects 

 more like a., sometimes occur. The first form, a., of . Forsteri, is 

 connected by intermediate variations with the other form, b., on the 

 one side, and with . on the other. In its proper state it has leajlets 

 pale green and concave, as those of R. rubiginosa often are ; serra- 

 tures shallow, sometimes indistinctly compound ; petioles hairy or 

 downy, more or less glandulose ; peduncle mostly naked, sometimes 

 hairy, very rarely feebly setose. Its prickles are as in S. The next 

 form, b. ]., but for the existence of intermediate plants, might well be 

 held a species. Its growth is mostly stout and dense j prickles less 

 dilated at the base, and less hooked than in the other vars. ; foliage 

 with a strong glaucous tinge, serratures coarse, often equal ; petioles 

 downy, usually, not always, without glands ; peduncle and calyx-tube 

 naked ; cal.-segments rather closely pinnate ; styles included ; stigmas 

 varying in prominence, considerably hairy ; fruit elliptical, often so 

 short as to be almost globular. The remaining form, b. 2., has highly 

 caesious twigs and more pubescent grey leaves. Its flowers are more 

 deeply coloured than is usual in the species, in other respects it ap- 

 proaches nearest to S. and to . a., although its leaflets are carinate. 

 From the tints of the foliage and flowers it has a general resemblance 

 to R. cassia. This form appears rare. It has not been observed in 

 Ireland. Mr. Borrer finds it at Henfield in England. 



14. R. casia, Sm. Glaucous Dog Rose. Prickles uniform, 

 uncinate; leaflets doubly serrated, downy, their disk eglandu- 

 lose ; calyx sparingly pinnate ; styles not united : shoots assur- 

 gent. Br. FL 1. p. 239. E. FL v. ii. p. 389. E. Bot. t. 2367. 



Plentiful near Belfast ; Mr. Templeton. Dungiven, County of 

 Derry ; Mr. D. Moore. Fl. June, July. I?. 'Stoloniferous, about 

 five feet high, upright, densely branched. Leaves elliptical, pointed, 

 downy beneath, very slightly so or quite smooth above ; serratures 

 sometimes regularly double, sometimes imperfectly so ; petioles glan- 

 dulose, and usually downy or hairy ; stipules fringed with glands, 

 downy or almost naked ; those next to the flowers changed into broad, 

 elliptical, pointed bracteas. Flowers usually solitary. Peduncle 

 naked, or sparingly setose. Calyx-tube elliptical, naked, and, like the 

 leaves and young twigs, very glaucous ; segments about as long as the 

 petals, broad at the base, sometimes glandulose at the back, sometimes 

 bare of glands in every parr, and only downy at the edges, somewhat 

 leafy at the point, and bearing a few narrowly lanceolate pinna, which 

 are either entire or toothed with glands. Petals uniform, pink or 

 white. Styles nearly, or quite included, hairy ; stigmas a round pro- 



